package com.chuanyang.driverh.utils;
import java.util.HashMap;

/**
 * 身份证号码的格式校验类
 * @author joyskim
 *
 */
public class IDCheckUtil {  
  
      private String _codeError;  
  
      //wi =2(n-1)(mod 11)  
      final int[] wi = {7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1};  
      // verify digit  
      final int[] vi = {1, 0, 'X', 9, 8, 7, 6, 5, 4, 3, 2};  
      private int[] ai = new int[18];  
      private static String[] _areaCode={"11","12","13","14","15","21","22"  
          ,"23","31","32","33","34","35","36","37","41","42","43","44"  
          ,"45","46","50","51","52","53","54","61","62","63","64","65","71","81","82","91"};  
      private static HashMap<String,Integer> dateMap;  
      private static HashMap<String,String> areaCodeMap;  
      static{  
            dateMap=new HashMap<String,Integer>();  
            dateMap.put("01",31);  
            dateMap.put("02",null);  
            dateMap.put("03",31);  
            dateMap.put("04",30);  
            dateMap.put("05",31);  
            dateMap.put("06",30);  
            dateMap.put("07",31);  
            dateMap.put("08",31);  
            dateMap.put("09",30);  
            dateMap.put("10",31);  
            dateMap.put("11",30);  
            dateMap.put("12",31);  
            areaCodeMap=new HashMap<String,String>();  
            for(String code:_areaCode){  
                  areaCodeMap.put(code,null);  
            }  
      }  
  
      //验证身份证位数,15位和18位身份证  
      public boolean verifyLength(String code){  
            int length=code.length();  
            if(length==15 || length==18){  
                  return true;  
            }else{  
                  _codeError="错误：输入的身份证号不是15位和18位的";  
                  return false;  
            }  
      }  
  
      //判断地区码  
      public boolean verifyAreaCode(String code){  
            String areaCode=code.substring(0,2);  
//            Element child=  _areaCodeElement.getChild("_"+areaCode);  
            if(areaCodeMap.containsKey(areaCode)){  
                  return true;  
            }else{  
                  _codeError="错误：输入的身份证号的地区码(1-2位)["+areaCode+"]不符合中国行政区划分代码规定(GB/T2260-1999)";  
                  return false;  
            }  
      }  
  
      //判断月份和日期  
      public boolean verifyBirthdayCode(String code){  
            //验证月份  
            String month=code.substring(10,12);  
            boolean isEighteenCode=(18==code.length());  
            if(!dateMap.containsKey(month)){  
                  _codeError="错误：输入的身份证号"+(isEighteenCode?"(11-12位)":"(9-10位)")+"不存在["+month+"]月份,不符合要求(GB/T7408)";  
                  return false;  
            }  
            //验证日期  
            String dayCode=code.substring(12,14);  
            Integer day=dateMap.get(month);  
            String yearCode=code.substring(6,10);  
            Integer year=Integer.valueOf(yearCode);  
  
            //非2月的情况  
            if(day!=null){  
                  if(Integer.valueOf(dayCode)>day || Integer.valueOf(dayCode)<1){  
                        _codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号不符合小月1-30天大月1-31天的规定(GB/T7408)";  
                        return false;  
                  }  
            }  
            //2月的情况  
            else{  
                  //闰月的情况  
                  if((year%4==0&&year%100!=0)||(year%400==0)){  
                        if(Integer.valueOf(dayCode)>29 || Integer.valueOf(dayCode)<1){  
                              _codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号在"+year+"闰年的情况下未符合1-29号的规定(GB/T7408)";  
                              return false;  
                        }  
                  }  
                  //非闰月的情况  
                  else{  
                        if (Integer.valueOf(dayCode) > 28 || Integer.valueOf(dayCode) < 1) {  
                              _codeError="错误：输入的身份证号"+(isEighteenCode?"(13-14位)":"(11-13位)")+"["+dayCode+"]号在"+year+"平年的情况下未符合1-28号的规定(GB/T7408)";  
                              return false;  
                        }  
                  }  
            }  
            return true;  
      }  
  
      //验证身份除了最后位其他的是否包含字母  
      public boolean containsAllNumber(String code) {  
            String str="";  
            if(code.length()==15){  
                  str=code.substring(0,15);  
            }else if(code.length()==18){  
                  str=code.substring(0,17);  
            }  
            char[] ch = str.toCharArray();  
            for (int i = 0; i < ch.length; i++) {  
                  if (! (ch[i] >= '0' && ch[i] <= '9')) {  
                        _codeError="错误：输入的身份证号第"+(i+1)+"位包含字母";  
                        return false;  
                  }  
            }  
            return true;  
      }  
  
      public String getCodeError(){  
            return _codeError;  
      }  
  
      //验证身份证  
      public boolean verify(String idcard) {  
            _codeError="";  
            //验证身份证位数,15位和18位身份证  
            if(!verifyLength(idcard)){  
                return false;  
            }  
            //验证身份除了最后位其他的是否包含字母  
            if(!containsAllNumber(idcard)){  
                  return false;  
            }  
  
            //如果是15位的就转成18位的身份证  
            String eifhteencard="";  
            if (idcard.length() == 15) {  
                  eifhteencard = uptoeighteen(idcard);  
            }else{  
                  eifhteencard=idcard;  
            }  
            //验证身份证的地区码  
            if(!verifyAreaCode(eifhteencard)){  
                  return false;  
            }  
            //判断月份和日期  
            if(!verifyBirthdayCode(eifhteencard)){  
                  return false;  
            }  
            //验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统  
            if(!verifyMOD(eifhteencard)){  
                  return false;  
            }  
            return true;  
      }  
  
      //验证18位校验码,校验码采用ISO 7064：1983，MOD 11-2 校验码系统  
      public boolean verifyMOD(String code){  
            String verify = code.substring(17, 18);  
            if("x".equals(verify)){  
                  code=code.replaceAll("x","X");  
                  verify="X";  
            }  
            String verifyIndex=getVerify(code);  
            if (verify.equals(verifyIndex)) {  
                  return true;  
            }  
//            int x=17;  
//            if(code.length()==15){  
//                  x=14;  
//            }  
            _codeError="错误：输入的身份证号最末尾的数字验证码错误";  
            return false;  
      }  
  
      //获得校验位  
      public String getVerify(String eightcardid) {  
            int remaining = 0;  
  
            if (eightcardid.length() == 18) {  
                  eightcardid = eightcardid.substring(0, 17);  
            }  
  
            if (eightcardid.length() == 17) {  
                  int sum = 0;  
                  for (int i = 0; i < 17; i++) {  
                        String k = eightcardid.substring(i, i + 1);  
                        ai[i] = Integer.parseInt(k);  
                  }  
  
                  for (int i = 0; i < 17; i++) {  
                        sum = sum + wi[i] * ai[i];  
                  }  
                  remaining = sum % 11;  
            }  
  
            return remaining == 2 ? "X" : String.valueOf(vi[remaining]);  
      }  
  
      //15位转18位身份证  
      public String uptoeighteen(String fifteencardid) {  
            String eightcardid = fifteencardid.substring(0, 6);  
            eightcardid = eightcardid + "19";  
            eightcardid = eightcardid + fifteencardid.substring(6, 15);  
            eightcardid = eightcardid + getVerify(eightcardid);  
            return eightcardid;  
      }  
}     
